International
Tables for Crystallography Volume A Space-group symmetry Edited by Th. Hahn © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. A. ch. 1.4, p. 7
Section 1.4.2. Symmetry planes parallel to the plane of projection^{a}Institut für Kristallographie, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany |
^{†}The symbols are given at the upper left corner of the space-group diagrams. A fraction h attached to a symbol indicates two symmetry planes with `heights' h and above the plane of projection; e.g. stands for and . No fraction means and (cf. Section 2.2.6
).
^{‡}For further explanations of the `double' glide plane e see Note (iv) below and Note (x) in Section 1.3.2 . ^{§}Glide planes d occur only in orthorhombic F space groups, in tetragonal I space groups, and in cubic I and F space groups. They always occur in pairs with alternating glide vectors, for instance and . The second power of a glide reflection d is a centring vector. |